Portion of a headlight for a motor vehicle



FIG. 1 is a perspective view of a portion of a headlight for a motor vehicle;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof; and,

FIG. 4 is a top view thereof.

The portion shown by broken lines is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a headlight for a motor vehicle, as shown and described. 